Method of making sound-record cylinders.



No. 689,408. Patented Dec. 24, l90l.

A. N. PETIT. METHOD 0F MAKING SOUND`RECORD GYLINDERS.

(Application led Dec. B. 1900A (un Model.)

MW m /W UNITED STATES PATENT yEErcE.

ADEMOR N. PETIT, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELE AND ALBERTO. PETIT, OF NEVARK, NEV JERSEY.

lVlETHODlOF MAKING SOUND-RECORD CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 689,408, dated December24, 1901- Application filed December 8| 1900. Serial No. 39,127. (Nospecimens.)

To all whom, t may concern: nection of the foundation and film in thisBeit known thatI,ADEMOR N. PETIT, acitimanner to replace the steam underpressure zen of the United States, residing at Newark, by air underpressure and to chill the matrix, in the county of Essex and State ofNew Jerso as to cool and set the parts and thereafter 5 sey, haveinvented an Improvement in the to maintain the pressure of airforasufticient 55 Method of Making Duplicate Sound-Record time until theconnected film and foundation Cylinders, of which the following is aspeciiare thoroughly set and cooled, after which cation. the same is tobe removed from the matrix.

Heretofore matrices have been made of In the drawings, Figure l is avertical secxo original sound-records, and duplicates have tion of adevice adapted for the carrying out of 6o been prepared from suchmatrices; and my myimproved method. Fig, 2isa partial vertipresentinvention relates to the method of cal section representing amodification, and making duplicate sound record cylinders Fig. 3 is adetached vertical section showing from matrices of an original record,and the part of a connected matrix and film upon a 15 same is animprovement upon the method set larger scale. 65 forth in myapplication, Serial No. 25,386, The improved apparatus for carrying outfiled July 3l, 1900. the method and making the article is prefer- Incarrying out my present invention I apably composed of a matrix a, ahead b, conply to the matrix-surface a material in a fluid nected by athreaded flange to one end of the 2o state, preferably by a brush andcentrifugal said matrix, a base c, connected also by a 7o motion, andwhich material as the same dries threaded fiange to the other end of thesaid and sets forms a skin or film upon the surmatrixin a similarmanner, there being packface of the matrix, which lm takes the imings 5,preferably, between the ends of the pression of the matrix in itssurface and matrix and the head and base, so as to insure e 5 serves forthe surface of the duplicate sounda tight joint. The base c ispreferably pro- 75 record cylinder. As a material for coating videdwithan exit-opening 2 and an escapethe surface of the matrix and forming thecock 3, and the head is preferably provided film I prefer to employcelluloid, gelatin, lac, with a pipe 4, and a three-way cock d conglue,gum, collodion, or similar material, and nected to the pipe 4, and fromthe opposite 3o this may be applied to any desired thickness side ofwhich there is a steam-pipe 6 andnrf in a fluid state. I employ afoundation or pipe 7 for compressed air. cylindrical shell fittingclosely within the said 8 represents the film duplicate sou nd-record,lm, and this foundation or shell is in whole and 9 the foundation orcylindrical shell. I or part of material adapted to be softened preferto employ within the head and base an- 3 5 and connected by heat andpressure through nular grooves to receive the foundation ends, 85adhesion to the duplicate sound-record film. with the object of insuringthe steam and air I prefer that the material of the foundation pressuredoing the work and preventing the or shell should be impregnated with orhave same getting in between the foundation and a surface of the samematerial as that comskin.

4o posing the film, so that connection between With the matrix.separated and disconnect- 9o the two by heat and pressure may be in theed in relation to the head and base, and which form of a cementingaction. matrix is formed in any manner well known I prefer to employ anapparatus into which in the art, the inner surface of the matrix issteam may be introduced under considerable to be coated to any desiredthickness by a ma- 45 pressure for the purpose of heating and softerialin a fluid state. l This material may be 95 tening the foundation orcylindrical shell and applied by a brush or centrifugal motion, or atthe same time expanding the same suffiboth, so as to impart to thematrix-surface ciently so as to form an intimate contact and an evenhomogeneous film until the desired adhesion with the film, and I proposeas soon thickness is obtained, `When the same is al- 5o as sufcient timehas elapsedto insure a conlowed to set or dry to yield an impression ofroo as the method of the present invention isl equally applicable toboth forms of foundation. This foundation is preferably made of materialadapted to befsoftened and connected by heat and pressure throughadhesion to the duplicate sound-record film, and the maferial of thefoundation is preferably of such a nature as to carry a substance of asimilar 2o nature to that composing the film either by being impregnatedwith or by having an applied surface coating of such material, so thatthe connection formed between the two by heat and pressu re may be acementing action. The material of the foundation may be and preferablyis the same as that of the film, but loaded with pigment to give bodyand cheapness.

After the film S has been made and the 3o foundation 9 inserted withinthe matrix the head Z2 and the base c are connected to the` matrix, asshown, and the ,escape-cock 3 closed. Steam is then admitted by the pipe6 and the three-way cock d and pipe t into the cavity or space Withinthe matrix and Within the said foundation. The heat softens thefoundation or cylindrical shell and the pressure expands the same. Theheat also softens the film so that the surface ofv 4o the film and thesurface of the expanding foundation come into intimate contact andconnection and a cementing action is pro` duced between the two, becauseof the substances of similar nature, by the heat and pressure, so thatthey are connected by ad- `h`esion. After sufficient time has elapsedfor this operation I prefer to close off the steam and to replace thesame by air under pressure and thereafter to submerge the matrix 5o intoa bath of cold Water, which suddenly chills the matrix, the film, andthe foundation,while the pressure is maintained Within the same. Ithereafter remove the matrix from the Water or cooling mixture. Insubstituting the air under pressure for the steam under pressure I turnthe three-Way cock and admit compressed air and open the escape-cock toblow out the steam. After the steam has been blown out the escape-cock 36o lis closed and the air-pressure maintained within the matrix untilthe parts are so thoroughly cooled and set that it is perfectly safe toclose ed the compressed air, separate the parts, and take out theduplicate sound-record cylinder complete.

If the film 8 is composed of Celluloid, the

foundation 9 should either be impregnated with a solvent of celluloid orshould have an applied surface of Celluloid or a solvent adheringthereto, so that the same, when softened with the lm and forced bypressure into connection with the materials, will join and form ahomogeneous connected or cemented mass, and in any event, whatevermaterial the film may be composed of, the backing or foundation shouldcarry a substance of a similar nature by being either impregnated withthe same or having an applied surface coating of such material, Whichunder heat and pressure will combine or com mingle with the material ofthe skin so as to form a homogeneous or permanently-connected mass.

I claim as my inventionl. The method herein specified of makingduplicate sound-record cylinders, consisting in forming upon the surfaceof a matrixa film of material applied thereto, inserting Within thematrix a-nd film a foundation or cylindrical shell closely fitting thesame and Which shell carries a substance of a similar nature to thatcomposing the film applying heat and pressure Within the foundation andmatrix to soften the material of the foundation or cylindrical shell andthat of the film and to force the same into intimate contact andadhesion, and maintaining the pressure until the part-s set and cool,substantially as set forth.

2. The method herein specified of making duplicate sound-recordcylinders, consisting in forming upon the surface of a matrix a film ofmaterial applied thereto, inserting Within the matrix and film afoundation or cylindrical shell closely fitting the same and which shellcarries a substance of a similar nature to that composing the film,applying heat and pressure Within the foundation and matrix to softenthe material ot' the foundation or cy lindrical shell and that of thefilm and to force the same into intimate contact and adhesion, andchilling the matrix and the connected film and foundation to set andcool the parts and maintaining the pressure during the chilling anduntil the operations are fully completed, substantially as set forth.

3. The method herein specified of making duplicate sound-recordcylinders, consisting in forming upon the surface of a matrix a film ofmaterial applied thereto, inserting Within the matrix and film afoundation or cylindrical shell closely tting the same and Which shellcarries a substance of a similar nature to that composing the film,applying pressure and heat within the foundation and matrix to softenthe material of the foundation or cylindrical shell and that of the filmand to force the same into intimate contact and adhesion, displacing thematerial producing the heat and pressure by air or similar fiuid underpressure and chilling the matrix by immersing the same in a coolingmaterial which at the same time chills the connected film IOG andfoundation, removing the same from the chilling mixture, and maintainingthe pressure thereafter until the parts are thoroughly set and thefinished sound-record ready for removal, substantially as set forth.

4. The method herein specified of making duplicate sound-recordcylinders consisting in forming upon the surface of a matrix a film ofmaterial applied thereto, placing Within the film a permanent base orbacking, applying heat and pressure to soften the partsand force theminto intimate ontact and adhesion, substantially as specitied.

5. The method herein specified of making duplicate sound-recordcylinders consisting in uniting a permanent base or backing to afilm-surface and impressing a record-matrix ADEMOR N. PETIT.

Witnesses:

GEO. T. PINOKNEY, S. T. HAVILAND.

